Last August I wrote about my deco chamber visit in Cozumel. I had not violated my computer but still ended up in a chamber for 2 visits, one for 5 hours 48 minutes and another one later that day for 3 hours. It was surmised that a long (7mile) walk the night before in the heat and humidity and continued use of a water pill lead me to a dehydrated state and hence the chamber visit. Some comments on this board encouraged me to see if perhaps I had pfo (a hole in my heart). I finally got around to having this checked and yes, in fact I do have pfo albeit a minor one. I'm going to have it corrected in the next month or so. My thanks to those who pointed out that I should look at this as another factor. The doctor has done 4,000 such procedures and has better than a 99.5% success ratio on the first installation. He has had zero doctor error problems. With shoulder surgery scheduled for next Thursday I will be almost totally repaired for my June visit to Cocoview and hopefully either Palau, the Philippines or the Red Sea within the next 6 months after that. I had pleaded with the doctor in Coz to allow me one dive which I already had scheduled in Hawaii (with the manta rays) and he said ok, ONE dive only because it is shallow (he initially said no diving for 6 months) and I did that one last week. Fabulous with 10 mantas. Life is good and I want to keep diving.